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प्रश्न
ZZ/ZW type of sex determination is seen in ______.
पर्याय
Peacock
Cockroach
Platypus
Snails
apple snail
human
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उत्तर
ZZ/ZW type of sex determination is seen in peacock.
Explanation:
The ZZ/ZW type of sex determination is seen in birds, many fishes, and reptiles. In this system, the female is heterogametic (ZW), meaning she produces two types of eggs,one with the Z chromosome and one with the W chromosome. The male is homogametic (ZZ), producing only one type of sperm with the Z chromosome.
APPEARS IN
संबंधित प्रश्न
"The sex of a newborn child is a matter of chance and none of the parents may be considered responsible for it". Draw a flow chart showing determination of sex of a newborn to justify this statement.
What are the chromosomes XY and XX known as?
Fill in the following blank with suitable word :
The...............chromosomes for a ............are XX whereas that for a ..............are XY.
Explain how, sex is determined in human babies.
In a human, how many chromosmes are present in an egg which has just been produced by the ovary?
In a human, how many chromosmes are present in a skin cell?
In a human, how many chromosmes are present in a fertilised egg?
The human animal which has an XY pair of chromosomes is called :
(a) male
(b) hybrid
(c) female
(d) doomed
Which combination of genes in the zygote will produce children with blue eyes?
The person A has only B chromosomes in all its gametes. On the other hand, another person C has chromosome D in half of gametes and chromosome E in the other half of gametes. When chromosomes B and D combine during fertilisation, a female zygote results. On the other hand, combination of B and E chromosomes produces a male zygote.
(a) What are chromosomes (i) B (ii) D, and (iii) E?
(b) Out of B, D and E, which two chromosomes are of the same type?
(c) Which chromosome is smaller in size?
(d) What is the general name of chromosomes such as B and E?
(e) Out of the two persons A and C, which one is (i) male, and (ii) female?
Choose the correct answer from the four options given below :
In a human male, a sperm will contain :
Drone of the honeybees shows haploid number of chromosomes. Illustrate.
In which livings, female decides the sex? Give two examples.
Write a short note on sex determination in man.
Give Technical Term:
The cell which determines the sex of a baby.
Short Answer Question.
“Father is responsible for determination of sex of child and not the mother”. Justify.
Explain the mechanism of sex determination in birds.
Distinguish between heterogametic and homogametic sex determination systems.
What is male heterogamety?
How is sex determined in human beings?
There are five daughters and no son in a family. It is because
Which of the following statements is not true with respect to variation?
Select the statements that describe characteristics of genes
- genes are specific sequence of bases in a DNA molecule
- a gene does not code for proteins
- in individuals of a given species, a specific gene is located on a particular chromosome
- each chromosome has only one gene
Some dinosaurs had feathers although they could not fly but birds have feathers that help them to fly. In the context of evolution this means that
The belief that the mother is completely responsible for the sex of the child is wrong because the child
The chromosomal constitution of a human female can be written as ______
How many types of gametes are produced by a human female?
Twins are born to a family that lives next door to you. The twins are a boy and a girl. Which of the following must be true?
